Grimm's Large Waldorf Building Blocks, Set of 15 Organically-Shaped Wooden Blocks (Colored) Brightly colored large, chunky wooden blocks are designed to inspire creative play & imaginative thinking. Handcrafted in Germany using sustainable hardwoods and certified non toxic, water-based stains. Waldorf school-inspired to encourage open-ended play: What can you build? You decide! No two sets are exactly the same: the shapes are unique & formed by real people, not machines! Big blocks vary in length & height (from 2.5 to 4.5 inches) but all have one side of uniform depth (just under 3 inches).